A fence-type terminal

Abstract

The utility model discloses a fence formula wiring terminal, including insulating shell, set up in the inside of insulating shell multiple conductive terminal and be used for fastening screw fastening mechanism of wire, insulating shell adopts ladder formula double row misplacement layout, including being equipped with multiple independent cavity for accommodating conductive terminal low row shell and high row shell, conductive terminal includes wiring surface, inserts section and welding foot section, and screw fastening mechanism includes screw and nut for the wire crimping. The utility model discloses through ladder formula double row misplacement layout, and optimization space and promote the creeping distance, and low row shell bottom shallow recess structure can block the tin solder climbing and enhance the heat dissipation, and high row shell bottom matrix openwork is convenient under the terminal platform arrangement element, improves the space utilization. The conductive terminal welding foot adopts the structure of doubling, and the cross-sectional area is increased to improve the current -carrying capacity, and the wire locking structure of screw and nut is reliable and durable. The terminal structure is compact, and the performance is excellent, and is suitable for the industrial scene of space limited.

Description

Technical Field

[0001] This utility model relates to the technical field of PCB board related components, and more specifically, to a fence-type terminal block. Background Technology

[0002] As a critical connection component on a PCB, the performance of barrier terminal blocks directly affects the wiring density, reliability, and spatial layout of the entire device. Currently, most barrier terminal blocks in the industry adopt a single-row or parallel double-row layout, and their insulating shell is usually a single solid base structure. This traditional design has several shortcomings that urgently need improvement: First, the parallel layout occupies a large amount of lateral space on the PCB, which is not conducive to the miniaturization and high-density integration of the device, and has limited effect on improving the creepage distance; second, although the solid base structure provides support, it completely occupies the valuable space below the terminal block, making it impossible to place other components below, thus reducing the space utilization rate of the PCB.

[0003] Regarding conductive components, traditional terminals often use single-layer stamping for their conductive terminal leads, which has a limited cross-sectional area, restricting the improvement of current carrying capacity. Furthermore, after soldering, solder is prone to excessive climbing along the leads due to capillary action, posing an insulation risk. In addition, the reliability and lifespan of conventional screw-locked wire structures have room for improvement in long-term use. Therefore, there is an urgent need for an innovative fence-type terminal solution that can achieve higher wiring density and space utilization within limited space, while simultaneously improving electrical performance, soldering quality, and connection reliability. Utility Model Content

[0004] In view of the above-mentioned problems in the existing technology, the purpose of this utility model is to provide a fence-type terminal block, including an insulating shell, a plurality of conductive terminals disposed inside the insulating shell, and a screw fastening mechanism for fastening the wires; The insulating shell adopts a stepped double-row staggered layout, including a low row shell and a high row shell. The low row shell and the high row shell are respectively provided with multiple independent cavities, and each cavity is used to accommodate one of the conductive terminals. Each of the conductive terminals is an integral structure, including a wiring surface, an insertion section, and a soldering foot section. The wiring surface is horizontally arranged and has screw through holes. The insertion section extends vertically downward from both sides of the wiring surface and is inserted into the corresponding cavity of the insulating shell and fixed by interference fit. The soldering foot section extends from the bottom of the insertion section and is used for soldering to the PCB board. The screw fastening mechanism includes a screw and a nut. The nut is fixed in the nut mounting groove of the insulating shell by an interference fit. The screw is screwed into the nut from above the screw through hole of the conductive terminal and is used to crimp the wire.

[0005] As a preferred embodiment, the bottom of the low-profile housing is provided with a solid base and a stepped shallow groove structure. The shallow groove structure is arranged around the solder foot section of the conductive terminal to block the capillary climb of solder and improve heat dissipation performance. The bottom of the high-profile housing is provided with a matrix hollow structure, which is located below the solder joint of the conductive terminal and is used to arrange other components under the terminal block.

[0006] As a preferred embodiment, the conductive terminal has a right-angled U-shape and is composed of a horizontally arranged wiring surface and two vertically arranged insertion sections on both sides. The wiring surface has a flat plate structure with embossed lines on the surface; The insertion section is provided with barbs on both sides, and the barbs form an interference fit with the inner wall of the cavity of the insulating shell; The welding leg segment has a folded structure, extends downward from the bottom of the insertion segment, and has a rounded bottom.

[0007] As a preferred embodiment, the screw is a combined screw structure, including a screw body, a spring washer, and a square washer; The screw body comprises, in sequence, a screw head, a smooth screw shaft, and a threaded shaft, with the screw head located above the wiring surface of the conductive terminal; The pad and the square pad are fitted onto the screw rod and located between the screw head and the wiring surface of the conductive terminal. The spring pad and the square pad can rotate freely but cannot be dislodged from the screw rod.

[0008] As the preferred solution The nut is a hexagonal nut with chamfered edges on both the top and bottom surfaces. The nut is fixed in the nut mounting groove of the insulating shell by interference fit. The inner wall of the nut mounting groove is provided with strip-shaped ribs, which contact the side of the nut to enhance fixation. The threaded hole of the nut is coaxially arranged with the screw through hole of the conductive terminal.

[0009] As the preferred solution In the stepped double-row staggered layout, the conductive terminals of the lower row shell and the conductive terminals of the higher row shell are arranged alternately to form a high-low staggered structure. The spacing between adjacent conductive terminals is designed according to safety regulations to improve creepage distance and optimize wiring space.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention optimizes space and improves creepage distance through a stepped, double-row staggered layout. The shallow groove structure at the bottom of the lower row housing blocks solder creep and enhances heat dissipation. The matrix cutout at the bottom of the higher row housing facilitates component placement under the terminal block, improving space utilization. The conductive terminal solder feet adopt a folded structure, increasing the cross-sectional area to improve current carrying capacity. The screw and nut locking structure is reliable and durable. This terminal has a compact structure and excellent performance, making it suitable for space-constrained industrial scenarios. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 2 This is a schematic diagram of the insulating shell structure of this utility model; Figure 3 This is a schematic diagram of the conductive terminal structure of this utility model; Figure 4 This is a schematic diagram of the screw fastening mechanism of this utility model; Figure 5 This is a schematic diagram of the nut structure of this utility model; Figure 6 This is a schematic diagram of the insulating outer bottom shell structure of this utility model. Detailed Implementation

[0012] The present invention will be further described below with reference to specific embodiments.

[0013] A fence-type terminal block includes an insulating housing 1, a plurality of conductive terminals 2 disposed inside the insulating housing 1, and a screw fastening mechanism 3 for fastening wires. The insulating shell 1 adopts a stepped double-row staggered layout, including a low-row shell 11 and a high-row shell 12. The low-row shell 11 and the high-row shell 12 are respectively provided with multiple independent cavities 13, and each cavity 13 is used to accommodate a conductive terminal 2. Each conductive terminal 2 is an integral structure, including a wiring surface 21, an insertion section 22 and a soldering foot section 23. The wiring surface 21 is horizontally arranged and has screw through holes 211. The insertion section 22 extends vertically downward from both sides of the wiring surface 21 and is inserted into the corresponding cavity 13 of the insulating shell 1 and fixed by interference fit. The soldering foot section 23 extends from the bottom of the insertion section 22 and is used for soldering to the PCB board. The screw fastening mechanism 3 includes a screw and a nut 32. The nut 32 is fixed in the nut mounting groove 14 of the insulating housing 1 by interference fit. The screw is screwed into the nut 32 from above the screw through hole 211 of the conductive terminal 2 and is used to crimp the wire.

[0014] The screw through hole 211 provided on the wiring surface 21 of the conductive terminal 2 has a carefully designed hole size, which can ensure that the screw can be screwed in smoothly and that sufficient pressure is provided when crimping the wire, so that the wire and the conductive terminal 2 can be in close contact, reducing contact resistance and improving conductivity.

[0015] The insulating housing 1 is made of engineering plastic with high insulation, high temperature resistance and good mechanical properties, which can ensure the stable operation of the fence-type terminal block in various harsh environments and effectively prevent safety hazards such as leakage and short circuit.

[0016] The screws and nuts 32 in the screw fastening mechanism 3 are made of high-strength metal materials and have undergone special surface treatment, which has the characteristics of rust prevention and wear resistance, ensuring that the performance of the terminal block will not be affected by loosening or corrosion during long-term use.

[0017] As a preferred embodiment, the bottom of the low-displacement housing 11 is provided with a solid base 111 and a stepped shallow groove structure 112. The shallow groove structure 112 is arranged around the solder foot section 23 of the conductive terminal 2 to block the capillary climb of solder and improve heat dissipation performance. The bottom of the high-profile housing 12 is provided with a matrix hollow structure 121, which is located below the solder foot section 23 of the conductive terminal 2 and is used to arrange other components under the terminal block.

[0018] The solid base 111 of the low-profile housing 11 provides a stable support for the entire terminal block. The stepped shallow groove structure 112 not only performs well in blocking the capillary rise of solder and improving heat dissipation, but also reduces the weight of the insulating housing 1 to a certain extent, making it easier to install and transport.

[0019] The matrix perforated structure 121 of the high-density housing 12 maximizes space utilization while ensuring air circulation, which helps dissipate heat from the conductive terminals 2 and extends their service life. Moreover, this structure is designed with compatibility with other components in mind, facilitating integration onto the circuit board.

[0020] In a preferred embodiment, the conductive terminal 2 has an overall shape of a right-angled U-shape, consisting of a horizontally arranged wiring surface 21 and two vertically arranged insertion sections 22 on both sides. The wiring surface 21 is a flat plate structure with a textured surface 212. The insertion section 22 is provided with barbs 221 on both sides, and the barbs 221 form an interference fit with the inner wall of the cavity 13 of the insulating shell 1; The welding leg segment 23 has a folded structure, extending downward from the bottom of the insertion segment 22, and the bottom is rounded at the corner 231.

[0021] The conductive terminal 2 adopts a right-angled U-shaped overall design, which not only provides a stable structure but also facilitates installation and fixation on the circuit board. The flat structure of the wiring surface 21, combined with the crimped lines 212, ensures the stability and conductivity of the wire connection, while the screw through-hole 211 design makes the installation process more convenient. The barbs 221 on both sides of the insertion section 22 form an interference fit with the inner wall of the cavity 13 of the insulating shell 1, which can effectively prevent the conductive terminal 2 from loosening or shifting during use, improving the reliability of the entire electrical connection. The folded structure of the soldering leg section 23 and the rounded corner 231 at the bottom not only enhance the mechanical strength of the soldering leg section but also help to better connect with the circuit board during the soldering process, improving the soldering quality. Preferably, the high-row and low-row conductive terminals 2 have the same structure except for the length. In a preferred embodiment, the screw is a combined screw structure, including a screw body, a spring washer 312 and a square washer 313; The screw body includes a screw head 3111, a smooth screw shaft 3112, and a threaded shaft 3113 in sequence. The screw head 3111 is located above the wiring surface 21 of the conductive terminal 2. The pads 312 and 313 are fitted onto the screw rod 3112 and located between the screw head 3111 and the wiring surface 21 of the conductive terminal 2. The pads 312 and 313 can rotate freely but cannot be dislodged from the screw rod 3112.

[0022] This combined screw structure design offers numerous advantages. The spring washer 312 provides elastic pressure, effectively preventing loosening after the screw is tightened and ensuring a stable connection. The square washer 313 increases the contact area with the conductive terminal 2's wiring surface 21, resulting in a more uniform pressure distribution and preventing damage to the conductive terminal 2 from excessive local pressure. Simultaneously, the screw head 3111 is positioned above the wiring surface 21 of the conductive terminal 2, facilitating tightening and loosening operations using tools. The smooth design of the screw shaft 3112 reduces friction between the spring washer 312 and the square washer 313 during rotation, allowing for more flexible rotation, while the threaded shaft 3113 ensures a secure connection between the screw and the connected component.

[0023] In a preferred embodiment, nut 32 is a hexagonal nut with chamfered edges 321 on both the top and bottom surfaces; Nut 32 is fixed in the nut assembly groove 14 of the insulating shell 1 by interference fit. The inner wall of the nut assembly groove 14 is provided with strip ribs 15, which contact the side of nut 32 to enhance fixation. The threaded hole of nut 32 is coaxially arranged with the screw through hole 211 of conductive terminal 2.

[0024] This design makes the connection between nut 32 and conductive terminal 2 more precise and reliable. The hexagonal shape of the nut facilitates tool operation, improving the efficiency of installation and disassembly. The chamfered edges 321 on both the top and bottom not only make nut 32 more aesthetically pleasing but also reduce interference with other components during installation. The interference fit ensures the stability of nut 32 within the insulating housing 1, preventing loosening during use. The ribs 15 further enhance the fixing effect between nut 32 and insulating housing 1, improving the overall reliability of the structure. The threaded hole of nut 32 is coaxial with the screw through hole 211 of conductive terminal 2, ensuring that the screw can pass smoothly and achieve a secure connection.

[0025] Nut 32 is a hexagonal nut with chamfered edges 321 on both the top and bottom. It is fixed to the nut assembly slot 14 of the outer casing 1 by interference fit, and has a threaded hole in the center. The design of this hexagonal nut prioritizes ease of use in practical applications. Its shape is compatible with common tools, enabling quick and accurate installation and removal. The chamfered edges on both sides not only enhance the nut's appearance but also reduce friction and collisions with adjacent components, thus lowering the risk of damage. The interference fit within the nut's mounting slot ensures stability during use, effectively preventing loosening due to vibration or external forces. The centrally located threaded hole matches the screw through-hole of the conductive terminal, providing a secure connection between the two.

[0026] In a preferred embodiment, in the stepped double-row staggered layout, the conductive terminals 2 of the low-row shell 11 and the conductive terminals 2 of the high-row shell 12 are arranged alternately to form a high-low staggered structure. The spacing between adjacent conductive terminals 2 is designed according to safety regulations to improve creepage distance and optimize wiring space.

[0027] The partitioned structure design between each conductive terminal 2 ensures that the electrical clearance and creepage distance between adjacent conductive terminals 2 meet safety requirements, effectively avoiding faults caused by electrical interference and improving the safety and reliability of the entire electrical system.

[0028] The contents not described in detail in this specification are existing technologies known to those skilled in the art, and their specifications and models can be selected according to actual conditions.

[0029] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical embodiments described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fence-type terminal block, comprising an insulating housing (1), a plurality of conductive terminals (2) disposed inside the insulating housing (1), and a screw fastening mechanism (3) for fastening wires, characterized in that: The insulating shell (1) adopts a stepped double-row staggered layout, including a low row shell (11) and a high row shell (12). The low row shell (11) and the high row shell (12) are respectively provided with multiple independent cavities (13), and each cavity (13) is used to accommodate one conductive terminal (2). Each of the conductive terminals (2) is an integral structure, including a wiring surface (21), an insertion section (22) and a soldering foot section (23). The wiring surface (21) is horizontally arranged and has screw through holes (211). The insertion section (22) extends vertically downward from both sides of the wiring surface (21) and is inserted into the corresponding cavity (13) of the insulating shell (1) and fixed by interference fit. The soldering foot section (23) extends from the bottom of the insertion section (22) and is used for soldering to the PCB board. The screw fastening mechanism (3) includes a screw and a nut (32). The nut (32) is fixed in the nut mounting groove (14) of the insulating housing (1) by interference fit. The screw is screwed into the nut (32) from above the screw through hole (211) of the conductive terminal (2) and is used to crimp the wire.

2. The fence-type terminal block according to claim 1, characterized in that, The bottom of the low-profile housing (11) is provided with a solid base (111) and a stepped shallow groove structure (112). The shallow groove structure (112) is arranged around the solder foot section (23) of the conductive terminal (2) to block the capillary climb of solder and improve heat dissipation performance. The bottom of the high-profile housing (12) is provided with a matrix hollow structure (121), which is located below the solder foot section (23) of the conductive terminal (2) and is used to arrange other components under the terminal block.

3. A fence-type terminal block according to claim 1, characterized in that, The conductive terminal (2) has a right-angled U-shape and is composed of the horizontally arranged wiring surface (21) and the vertically arranged insertion sections (22) on both sides. The wiring surface (21) is a flat plate structure with a pressure line pattern (212) on the surface. The insertion section (22) is provided with barbs (221) on both sides, and the barbs (221) form an interference fit with the inner wall of the cavity (13) of the insulating shell (1); The welding leg segment (23) has a folded structure, extending downward from the bottom of the insertion segment (22), and the bottom is rounded (231).

4. A fence-type terminal block according to claim 1, characterized in that, The screw is a combined screw structure, including a screw body, a spring washer (312) and a square washer (313). The screw body includes a screw head (3111), a smooth screw shaft (3112), and a threaded shaft (3113) in sequence. The screw head (3111) is located above the wiring surface (21) of the conductive terminal (2). The spring pad (312) and the square pad (313) are fitted onto the screw rod (3112) and located between the screw head (3111) and the wiring surface (21) of the conductive terminal (2). The spring pad (312) and the square pad (313) can rotate freely but cannot be dislodged from the screw rod (3112).

5. A fence-type terminal block according to claim 1, characterized in that, The nut (32) is a hexagonal nut with chamfered edges (321) on both the top and bottom surfaces; The nut (32) is fixed in the nut assembly groove (14) of the insulating shell (1) by interference fit. The inner wall of the nut assembly groove (14) is provided with strip ribs (15). The strip ribs (15) contact the side of the nut (32) to enhance the fixation. The threaded hole of the nut (32) is coaxially arranged with the screw through hole (211) of the conductive terminal (2).

6. A fence-type terminal block according to claim 1, characterized in that, In the stepped double-row staggered layout, the conductive terminals (2) of the low-row shell (11) and the conductive terminals (2) of the high-row shell (12) are arranged alternately to form a high-low staggered structure; The spacing between adjacent conductive terminals (2) is designed according to safety regulations to improve creepage distance and optimize wiring space.

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